Novel compounds of the formula: ##STR1## wherein R.sup.1 is lower alkyl; R.sup.2 is hydrogen or lower alkyl, which are produced by reacting a compound of the formula: ##STR2## wherein R.sup.3 is hydrocarbon residue, with a compound of the formula: ##STR3## The novel compounds have antiviral and antibacterial activity, and are useful to prolong the life span of tumor-bearing warm-blooded animals.
新化合物的
化学式为:##STR1## 其中 R.sup.1 是较低的烷基;R.sup.2 是氢或较低的烷基,这些化合物是通过将化合物的反应产物制备而成的:##STR2## 其中 R.sup.3 是烃残基,与化合物的反应产物:##STR3## 这些新化合物具有抗病毒和抗菌活性,并可用于延长患肿瘤的温血动物的寿命。